chore(deps-dev): bump @semantic-release/exec from 5.0.0 to 6.0.2

Bumps [@semantic-release/exec](https://github.com/semantic-release/exec) from 5.0.0 to 6.0.2.
- [Release notes](https://github.com/semantic-release/exec/releases)
- [Commits](semantic-release/exec@v5.0.0...v6.0.2)

---
updated-dependencies:
- dependency-name: "@semantic-release/exec"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -26,7 +26,7 @@
     "@babel/core": "^7.0.0",
     "@babel/preset-env": "^7.0.0",
     "@jsdevtools/coverage-istanbul-loader": "^3.0.5",
-    "@semantic-release/exec": "^5.0.0",
+    "@semantic-release/exec": "^6.0.2",
     "@semantic-release/git": "^9.0.0",
     "angular": "^1.6.0",
     "angular-mocks": "^1.6.0",